diff --git a/Qiniu/IO/Resumable/ResumablePut.cs b/Qiniu/IO/Resumable/ResumablePut.cs
index b6ed3777..e5578f9a 100644
--- a/Qiniu/IO/Resumable/ResumablePut.cs
+++ b/Qiniu/IO/Resumable/ResumablePut.cs
@@ -1,14 +1,14 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Text;
-#if NET40
-using System.Threading.Tasks;
-#endif
-using Qiniu.Auth;
-using Qiniu.Conf;
-using Qiniu.RPC;
-using Qiniu.RS;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+#if NET40
+using System.Threading.Tasks;
+#endif
+using Qiniu.Auth;
+using Qiniu.Conf;
+using Qiniu.RPC;
+using Qiniu.RS;
 using Qiniu.Util;
 
 namespace Qiniu.IO.Resumable
@@ -77,6 +77,8 @@ public CallRet PutFile(string upToken, string localFile, string key)
                 throw new Exception(string.Format("{0} does not exist", localFile));
             }
             
+            string fname = Path.GetFileName(localFile);
+
             PutAuthClient client = new PutAuthClient(upToken);
             CallRet ret;
             using (FileStream fs = File.OpenRead(localFile))
@@ -84,7 +86,7 @@ public CallRet PutFile(string upToken, string localFile, string key)
                 int block_cnt = block_count(fs.Length);
                 long fsize = fs.Length;
                 extra.Progresses = new BlkputRet[block_cnt];
-                byte[] byteBuf = new byte[BLOCKSIZE];
+                byte[] byteBuf = new byte[BLOCKSIZE];
                 int readLen = BLOCKSIZE;
                 for (int i = 0; i < block_cnt; i++)
                 {
@@ -103,7 +105,7 @@ public CallRet PutFile(string upToken, string localFile, string key)
                         extra.OnNotify(new PutNotifyEvent(i, readLen, extra.Progresses[i]));
                     }
                 }
-                ret = Mkfile(client, key, fsize);
+                ret = Mkfile(client, key, fsize,fname);
             }
             if (ret.OK)
             {
@@ -172,7 +174,7 @@ private BlkputRet Mkblock(Client client, byte[] firstChunk, int blkSize)
             return null;
         }
 
-        private CallRet Mkfile(Client client, string key, long fsize)
+        private CallRet Mkfile(Client client, string key, long fsize, string fname)
         {
             StringBuilder urlBuilder = new StringBuilder();
             urlBuilder.AppendFormat("{0}/mkfile/{1}", Config.UP_HOST, fsize);
@@ -180,6 +182,10 @@ private CallRet Mkfile(Client client, string key, long fsize)
             {
                 urlBuilder.AppendFormat("/key/{0}", Base64URLSafe.ToBase64URLSafe(key));
             }
+            if (fname != null)
+            {
+                urlBuilder.AppendFormat("/fname/{0}", Base64URLSafe.ToBase64URLSafe(fname));
+            }
             if (!string.IsNullOrEmpty(extra.MimeType))
             {
                 urlBuilder.AppendFormat("/mimeType/{0}", Base64URLSafe.ToBase64URLSafe(extra.MimeType));
@@ -220,4 +226,4 @@ private int block_count(long fsize)
             return (int)((fsize + blockMashk) >> blockBits);
         }
     }
-}
+}